Catalytic effect of Ni nano-particle and Nb oxide on H-desorption properties in MgH2 prepared by ball milling

N. Hanada; T. Ichikawa; H. Fujii

doi:10.1016/j.jallcom.2004.12.166

Catalytic effect of Ni nano-particle and Nb oxide on H-desorption properties in MgH₂ prepared by ball milling

N. Hanada^*, T. Ichikawa, H. Fujii

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

116 Citations (Scopus)

Abstract

We examined the catalytic effect of Ni nano-particle and Nb oxide on hydrogen desorption (HD) properties in MgH₂ prepared by mechanical ball milling under a hydrogen gas atmosphere of 1 MPa. The MgH₂ composite with 2 mol% Ni nano-particle prepared by milling for a short time of 15 min at 200 rpm desorbed a large amount of hydrogen (∼ 6.5 wt.%) in the temperature range from 150 to 250 ° C at heating rate of 5 ° C/min. On the other hand, the MgH₂ composite with 1 mol% Nb₂O ₅ prepared by milling for a long time of 20 h at 400 rpm desorbed ∼ 6.0 wt.% H₂ in the temperature range from 200 to 250 ° C at heating rate of 5 ° C/min. After second hydrogen absorption/desorption cycles at 200 ° C, the HD properties of the Ni-catalyzed MgH₂ composite became worse than those before cycling, while the Nb₂O ₅-catalyzed composite showed better HD properties than those before cycling.

Original language	English
Pages (from-to)	716-719
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	404-406
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jallcom.2004.12.166
Publication status	Published - 2005 Dec 8
Externally published	Yes

Keywords

High energy ball milling
Hydrogen storage material
Thermal analysis
X-ray diffraction

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2004.12.166

Cite this

@article{57ce29f7f6c64d1ab4fa6771ed968c98,

title = "Catalytic effect of Ni nano-particle and Nb oxide on H-desorption properties in MgH2 prepared by ball milling",

abstract = "We examined the catalytic effect of Ni nano-particle and Nb oxide on hydrogen desorption (HD) properties in MgH2 prepared by mechanical ball milling under a hydrogen gas atmosphere of 1 MPa. The MgH2 composite with 2 mol% Ni nano-particle prepared by milling for a short time of 15 min at 200 rpm desorbed a large amount of hydrogen (∼ 6.5 wt.%) in the temperature range from 150 to 250 ° C at heating rate of 5 ° C/min. On the other hand, the MgH2 composite with 1 mol% Nb2O 5 prepared by milling for a long time of 20 h at 400 rpm desorbed ∼ 6.0 wt.% H2 in the temperature range from 200 to 250 ° C at heating rate of 5 ° C/min. After second hydrogen absorption/desorption cycles at 200 ° C, the HD properties of the Ni-catalyzed MgH2 composite became worse than those before cycling, while the Nb2O 5-catalyzed composite showed better HD properties than those before cycling.",

keywords = "High energy ball milling, Hydrogen storage material, Thermal analysis, X-ray diffraction",

author = "N. Hanada and T. Ichikawa and H. Fujii",

note = "Funding Information: This work was supported by a Grant-in-Aid for COE Research (No. 13CE2002) of the Ministry of Education, Sciences and Culture of Japan, and the New Energy and Industrial Technology Development Organization (NEDO), Japan.",

year = "2005",

month = dec,

day = "8",

doi = "10.1016/j.jallcom.2004.12.166",

language = "English",

volume = "404-406",

pages = "716--719",

journal = "Journal of the Less-Common Metals",

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T1 - Catalytic effect of Ni nano-particle and Nb oxide on H-desorption properties in MgH2 prepared by ball milling

AU - Hanada, N.

AU - Ichikawa, T.

AU - Fujii, H.

N1 - Funding Information: This work was supported by a Grant-in-Aid for COE Research (No. 13CE2002) of the Ministry of Education, Sciences and Culture of Japan, and the New Energy and Industrial Technology Development Organization (NEDO), Japan.

PY - 2005/12/8

Y1 - 2005/12/8

N2 - We examined the catalytic effect of Ni nano-particle and Nb oxide on hydrogen desorption (HD) properties in MgH2 prepared by mechanical ball milling under a hydrogen gas atmosphere of 1 MPa. The MgH2 composite with 2 mol% Ni nano-particle prepared by milling for a short time of 15 min at 200 rpm desorbed a large amount of hydrogen (∼ 6.5 wt.%) in the temperature range from 150 to 250 ° C at heating rate of 5 ° C/min. On the other hand, the MgH2 composite with 1 mol% Nb2O 5 prepared by milling for a long time of 20 h at 400 rpm desorbed ∼ 6.0 wt.% H2 in the temperature range from 200 to 250 ° C at heating rate of 5 ° C/min. After second hydrogen absorption/desorption cycles at 200 ° C, the HD properties of the Ni-catalyzed MgH2 composite became worse than those before cycling, while the Nb2O 5-catalyzed composite showed better HD properties than those before cycling.

AB - We examined the catalytic effect of Ni nano-particle and Nb oxide on hydrogen desorption (HD) properties in MgH2 prepared by mechanical ball milling under a hydrogen gas atmosphere of 1 MPa. The MgH2 composite with 2 mol% Ni nano-particle prepared by milling for a short time of 15 min at 200 rpm desorbed a large amount of hydrogen (∼ 6.5 wt.%) in the temperature range from 150 to 250 ° C at heating rate of 5 ° C/min. On the other hand, the MgH2 composite with 1 mol% Nb2O 5 prepared by milling for a long time of 20 h at 400 rpm desorbed ∼ 6.0 wt.% H2 in the temperature range from 200 to 250 ° C at heating rate of 5 ° C/min. After second hydrogen absorption/desorption cycles at 200 ° C, the HD properties of the Ni-catalyzed MgH2 composite became worse than those before cycling, while the Nb2O 5-catalyzed composite showed better HD properties than those before cycling.

KW - High energy ball milling

KW - Hydrogen storage material

KW - Thermal analysis

KW - X-ray diffraction

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